Recording device



W. D. PEARSON.

RECORDING DEVICE. APPLICATION FILED JUNE 10, 1920.

1,363,913. Patented Dec. 28, 1920.

UNITED STATES WILLIAM D. PEARSON, OF PORTLAND, OREGON.

RECORDING DEVICE.

Application filed June '10, 1920. Serial is a specificat on.

The principal object of this invention is to produce a recording devicewhich may be used to advantage in recording the hours or periods ofoperation of a machine with which the device is associated.

Another object is to produce a device which will be automatic inoperation and will start recording automatically as soon as the deviceto which it is attached commences .to operate and will cease recordingas soon as the device ceases operating.

In many instances it is very desirable to know the exact number of hoursthat a piece of apparatus operates. For instance,-in flying machines itis essential to know the total number of hours that operated as it isnecessary to engines overhauled after a stipulated number of operatinghours, in order to avoid mechanical defects which would be serious tothe aviator should the machine cease to properly function.

Another object of this invention is to produce a recorder which will besimple in operation and which may be manufactured at a reasonable cost.

Another object of this invention is to produce an automatic controlwhich will be positive in operation and one which will operate under allconditions.

Other objects and advantages will be seen from the detail descriptionwhich follows.

The accompanying drawing illustrates the preferred manner of reducingthe invention to practice. front elevation of my recorder; Fig. 2 is across section of Fig. 1 of my recorder.

In the. drawings, like numerals refer to corresponding parts in the twoviews.

Numeral 5 designates an instrument board which may be convenientlylocated either in a vehicle or upon a wall, the same simply serving thepurpose of supporting my rethe engine has .corder.

Numeral 6 designates a circular casing having a flange 7 and a centralpartition 8, a backing piece 9, which is adapted to be Specification ofLetters Patent.

have such a In said drawing Figure'l is a Patented Dec. 28, 1920.

attached to the shell 6 in a convenient manner.

At 11 I have shown a ring screw threaded upon the shell 6 serving thepurpose of holding a glass 12.

The numeral 13 desi upon the partition 8. This dial is divided aroundits outer margin so as to represent the hours of the day,as indicated at1 1. This dial 13 also carries an inner circular dial, which is dividedinto 120 divisions, which indicate the total number of hours as will behereinafter described.

At 17 I have shown a spring mechanism for driving a train of gears 18,which gears in turn mesh with a series of gears 19,20 and 21; the gear20 being mounted upon a shaft 22, which shaft carries a hand 23 at itsouter end. The gear 21 is mounted upon a stub shaft 2a journaled uponthe shaft 22 and carries a hand 26 at its outer end. The gear 19 ismounted upon a second shaft 27 which is journaled on the stub shaft 24and carries at its outer end a hand 28. The hands 23 and 26 correspondto the minute and hour hands of an ordinary clock while the hand 28 isadapted to move over the dial having .the 120 divisions to indicate thetotal hours operated.

At 29 I have shown a gear meshing with the gear 20 and connected by a.chain 31 to a shaft 32 upon which a friction disk 33 is mounted.

The numeral 3 1 designates a diaphragm having a rod 36 secured to itscenter portion and extending forwardly and slidably supported in thepartition 8. This rod 36 carries a finger 37, which is adapted tocontact with the friction disk 33 as will be later described.

A spring 38 encircles the rod 36 and has one end bearing against thediaphragm 34; and has its opposite end bearing against the backing piece9.

At 39 I have shown a pipe having communication with the diaphragm 34through a suitable opening 41 formed in a cover plate 42. This pipe 39leads to the lubrication system of a motor so that pressure may betransmitted therethrough.

In operation, I place my device upon the instrument board as beforementioned and connect the pipe 39 to the forced feed l.ubricating systemof a motor or like device. then wind the clock mechanism and set thenates a dial carried hour and minute hands Where desired, settin thesmall hand 28 at zero.

s soon as the motor to which this device is attached commences tooperate pressure Will be transmitted through the pipe 39 to thediaphragm 34, which will tend to compress the spring 38 and move the rod36, thereby moving the finger 37 out of contact with the friction disk38. This movement will allow the spring mechanism and gears attachedthereto to rotate, which rotation will cause the hour and minute handsto travel about the dial and at the same time Will cause the hand 28 totravel about its dial, but as the hand 28 travels slower than either thehands 23 or 26 it will record the total number of hours that the devicehas been operating, with the result that an accurate record may be keptof the number of hours that the machine having my device connectedthereto has been in operation.

I claim:

1. In a device of the character described, a combination of an internalcombustion engine having a forced feed lubricating system, a recordingdevice remotely positioned from said engine, said recording devicecomprising a clock mechanism having an hour dial and a total hour dial,hands capable of being moved over said dials, and a diaphragm capable ofbeing moved through pressure derived from said engine lubricating systemfor the purpose of starting and stopping the action of said clockmechanism.

n a recording device. a suitable casing, a clock mechanism mountedtherein, a dial mounted thereon, said dial having hour markings thereonand total hour markings concentrically placed with relation to said hourmarkings, hands capable of being moved over said dials through themedium of said clock mechanism, one of said hands moving over said totalhour dial at a speed greatly reduced from that of either of the otherhands, a diaphragm attached to said casing, said diaphragm having a rodextending forwardly therefrom a finger attached thereto, said fingerbeing adapted to contact with a friction member for the purpose ofcontrolling the movement of said mechanism, and means for conducting afluid pressure to said diaphragm for the purpose of moving said fingeraway from said friction member.

WILLIAM D. PEARSON.

